So i've seen this in a few other pictures when the iPhone 5 first came out, but never saw any answers.
Is there a reason that only the iPhone 5 and no the 3GS or 4 or 4S shows this? Tried to do some searching on the forums but couldn't find anyone that had talked about it.
EDIT: this picture is from this article
http://www.engadget.com/2012/10/02/iphone-vs-rivals-audio-tests/
and i noticed that they tested and the iPhone 5 has lower max volume than the 4 and 4s, which then makes this really puzzling why they would include the "high volume" indicator on a quieter phone
Is there a reason that only the iPhone 5 and no the 3GS or 4 or 4S shows this? Tried to do some searching on the forums but couldn't find anyone that had talked about it.

EDIT: this picture is from this article
http://www.engadget.com/2012/10/02/iphone-vs-rivals-audio-tests/
and i noticed that they tested and the iPhone 5 has lower max volume than the 4 and 4s, which then makes this really puzzling why they would include the "high volume" indicator on a quieter phone